VERBENONE - DOSE-DEPENDENT INTERRUPTION OF PHEROMONE-BASED ATTRACTIONOF 3 SYMPATRIC SPECIES OF PINE BARK BEETLES (COLEOPTERA, SCOLYTIDAE)

Verbenone significantly reduced catches of Ips latidens (LeConte), I. pini (Say), and Dendroctonus ponderosae Hopkins in multiple-funnel tra ps, baited with aggregation pheromones, in stands of lodgepole pine in southern British Columbia. Interruption of attraction was dose depend ent for all three species. There were no significant differences in at traction between the sexes. Variation in successful use of verbenone i n protecting pine stands partially may be explained by the dose-depend ent variation in responses.